You need to match the diameter of the sabot to the bullet. Look on your box of bullets it should tell you the diameter. If they are .452 then you should get some Harvester, Harvester Crushed Rib, MMP Hp-12, MMP HP-24, and one of them will work. If they are .458 then you need to get some of the orange MMP sabots that handle the .457-.458 size bullets.

Powder I would get Triple Se7en 2f. I would start with 100 grains of powder and try that. If they shoot well, kick the powder up to 110 grains and see what happens. Those are excellent bullets. Sabotloader shoots them all the time and I am sure he has much better information about them then I could ever give. Good luck.